Ester-C is essentially a highly PH neural and absorbable form of Vitamin C. This makes less irritating for your digestive trace. Solgar’s patented ingredients allow the Vitamin C to also be properly metabolized, whilst also being easily digested. Vitamin C has many positive benefits for our immune systems. It can be taken to fight off colds and flus as well as hayfever. Blood pressure levels can also be lowered while supplementing on Ester-C.